<!DOCTYPE HTML>
<html>
<head>
  <title>Tests for MozAfterPaint</title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="application/javascript" src="plugin-utils.js"></script>
  <script type="application/javascript">
    setTestPluginEnabledState(SpecialPowers.Ci.nsIPluginTag.STATE_ENABLED);
  </script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<p id="display">
<embed type="application/x-test" width="100" height="100" id="p"
       drawmode="solid" color="FF00FF00"></embed>
</p>
<div id="content" style="display: none">
  
</div>
<pre id="test">
<script class="testbody" type="text/javascript">

SimpleTest.waitForExplicitFinish();
SimpleTest.requestFlakyTimeout("untriaged");

var initialPaintCount, afterPaintCount;
var color = 0;

function onAfterPaint () {
  afterPaintCount += 1;
}

function startTest() {
  setTimeout(function () {
    afterPaintCount = 0;
    initialPaintCount = window.mozPaintCount;
    window.addEventListener("MozAfterPaint", onAfterPaint, true);
    doBackgroundFlicker();
  }, 500);
}

document.addEventListener("DOMContentLoaded", startTest, true);

// Unfortunately we cannot reliably assert that mozPaintCount and afterPaintCount increment perfectly
// in sync, because they can diverge in the presence of OS-triggered paints or system load.
// Instead, wait for a minimum number of afterPaint events to at least ensure that they are being fired.
const minimumAfterPaintsToPass = 10;

function doPluginFlicker() {
  ok(true, "Plugin color iteration " + color + 
     ", afterpaint count: " + afterPaintCount +
     ", mozpaint count: " + window.mozPaintCount);
  if (afterPaintCount >= minimumAfterPaintsToPass) { 
    ok(true, "afterPaintCount incremented enough from plugin color changes.");
    SimpleTest.finish();
    return;
  }

  color = (color + 1) % 256;
  var str = color.toString(16);
  if (str.length < 2) {
    str = "0" + str;
  }
  str = "FF" + str + str + str;
  document.getElementById("p").setColor(str);
  setTimeout(doPluginFlicker, 0);
}

function doBackgroundFlicker() {
  ok(true, "Background color iteration " + color + 
     ", afterpaint count: " + afterPaintCount +
     ", mozpaint count: " + window.mozPaintCount);
  if (afterPaintCount >= minimumAfterPaintsToPass) {
    ok(true, "afterPaintCount incremented enough from background color changes.");
    afterPaintCount = 0;
    initialPaintCount = window.mozPaintCount;
    doPluginFlicker();
    return;
  }

  color = (color + 1) % 256;
  document.body.style.backgroundColor = "rgb(" + color + "," + color + "," + color + ")";
  setTimeout(doBackgroundFlicker, 0);
}

</script>
</pre>

<div style="height:4000px"></div>
<a id="first"  href="http://www.mozilla.org/">first<br>link</a>
<a id="second" href="http://www.mozilla.org/">second link</a>
<a id="third"  href="http://www.mozilla.org/">third<br>link</a>
<div style="height:4000px"></div>

</body>
</html>

